these 2 derivations will be built:
  /nix/store/qlcil3q60dnp6rb4jd7n70blx848q0rv-amp-linux-x64.drv
  /nix/store/46m6shpc904s9qfpg68lpfznf17rz36d-amp-0.0.1787529709-gc0f154.drv